Elevator-lock.



Patented Feb. 16, 1915.

2 SHEETS-SHEET 1.

R. F. LE BROGQ.

ELEVATOR LOCK APPLICATION FILED SEPT. 24, 1913.

THE NoRRls PETERS co., PmrroJJ-r/mv4 WASHING rmv, nv c R. F. LE BROCQ. ELEVATOB. LOCK.

APPLICATION FILED s312124, 191s.

Lg, Patented Feb. 16, 1915.

2 SHEETS-SHEET 2.

am @y THE MORRIS PETERS CO.. PHOTo-LlTHu., WAsHlNGroN. D. C.

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RICHARD F. LE BROCQ, 0F NEW YORK, N. Y., ASSIGNOR TO THE LE BROCQ COMPANY, 0F BROOKLYN, NEW YORK. A CORPORATION OF NEW YORK.

EL-EVATOR-LOCK.

Specification of Letters Patent.

Patented Feb. 16, 1915..

Application filed September 24, 1913. Serial No. 791,476.

To all 'whom it may concern Beit known that I, RICHARD F. LE BROCQ, of the city of New York, county of Kings, and State of New York, have invented a new and useful improvement in Elevator-Locks, of which the following is a full, clear, and exact description;

My invention relates to improvements in devices for locking the elevator, and more specifically the elevator controller when the car is opposite a door, so that the car cannot possibly be started except when the door is tightly closed. 1 am aware that numerous devices of this kind have been invented, some of which are dependent on an electric circuit for their successful operation, and these are objectionable because of the fact that the circuit is likely to be interrupted and the locking device rendered useless. Some such devices have mechanical locks to engage the car itself and lock it to the ad-` jacent wall, but these devices are complicated, and such nicety is required in their operation that they are objectionable. Other devices are dependent on mechanical action only, but most of them are complicated and unreliable.

The object of my invention is to produce a very simple, reliable and inexpensive locking device, which is not dependent on an electric current, and which when a door is opened, will positively lock the controller oi the elevator car in a central position so that the car cannot be started, and will also positively release the controller when the door is closed.

My invention is intended further to produce an apparatus of this kind which in case the controller happens to be slightly 0H center when the door is closed, can easily be brought to a positive center and then positively locked.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views. I

Figure 1 is a broken sectional elevation of my improved apparatus as applied to a car, showing the -floor connection. Fig. 2 is a broken sectional plan of the apparatus shown in Fig. 1. Fig. 3 is a broken enlarged rear elevation of that portion of the apparatus which engages the controller or controlling lever. Fig. 4 is an enlarged detail cross section through the locking part which comes in direct connection with the dog on the controlling lever, and Fig. 5 is a vertlcal section on the line 5 5 of Fig. 3.

The elevator car 10 can be of any approved construction, and operated in any customary manner, and in Fig. 1 li have shown it at rest opposite an ordinary sliding door 11 which also can be of any usual kind. rihe car is provided with a swinging controlling lever 12 as usual, this being pivoted at 141 and working in the guide 13, but the arrangement of the guide 13 and the lever can be of any usual kind, and has nothing to do with my invention. 1t is understood oi course, however, that the controlling lever is operated to stop and start the car, but I have not shown these accessories as they have nothing to do with the invention. On the back of the lever 12 is a fixed depending dog 15 which is preferably a part of the block 16 (see Figs. 3 and 5), so that by means of the screws 17 or equivalent fastenings, 'the dog can be rigidly attached to the lever 412.

The dog 15 is engaged by pawls 18 to lock the lever in its central position and prevent it from being operated to start the car, and these pawls as shown in Fig. 4 are rounded on the back portions, and have fiat inner faces which engage the dog 15. The pawls are normally pressed upward, so as to engage the dog, by springs 21, and the movement 0'1"' the pawls upward is limited by set-screws 22 (see Fig. 1). The pawls move in a block 19, which is perforated as shown at 23 so that it can be pivoted by the pin 24 or otherwise to the cross arm 20 which will be presently referred to. The block 19 is also preferably provided with a back plate 25 which serves as a backing or abutment for the springs 21. The block 19 moves vertically in a suitable way, as for instance between guide cleats 26 which can be attached to the guard or guide 13 or its equivalent. 1t will be noticed that the block 19 is pivoted to the cross-arm 20, so that while the latter swings in the arc oi a circle, the block, by reason of its pivotal connection, will also have a vertical movement between the guides 26, which is permissible because the movement is very slight, and there is sulcient play around the pin 241 and between the guides 26 to permit of this very slight movement. The cross arm 20 is pivoted as shown at 28 to a convenient support, and at its free end it is provided With a heavy link 29 Which serves as a Weight as Well as a lifting device, so that it Will normally by gravity pull dovvn the arm 20 yand block 19, thereby leaving the lever 1,2 free to swing. The lower end of the link 29 rests on the upper arm 30 of the bell crank 3l (see Fig. l) which is pivoted in the guide or guard 13, and has its lower arm 32 vertically arranged and in contact With a slide bar 33 which moves in a guide 3l and projects outward beyond the floor of the car 10, terminating in an enlarged head 35 which is adapted to frictionally engage the shoe 36 on the floor opposite the car. The shoe 36 is elongated and bent outward at the ends as shown at 37, so that when the car moves up or down, the head 35 Will readily engage the shoe, and the length of the shoe is sufficient to operate the locking mechanism even though the car is not eX- actly opposite the adjacent iioor of the elevator Well. The slide bar 38r is suitably guided, is normally retracted by the spring 39, and is provided at its outer end with a roller 40 or equivalent device, which is adapted to Contact With the back edge of the door l1, and in this connection attention is called tothe fact that the door 1l must be closed in order to free the roller 40 and the slide bar 38.

It Will beseen that When the door is open even to a slight extent, the shoe 36 Will be pushed int-o the elevator Well and into the path .ofV the head 35, so that the shoe will push inward on the slide bar 33, and this Will tilt the bell crank 30, lift the link 39 and arm 20, and bring the paWls 18 into engagement With the dog l5, when the lever l2 is in its central position, and if the lever 12'should not be quite centered, the paWls Will permit it to be centered and Will then engage and securely lock it.

It Will be observed that the invention which I have described is of great simplicity, it Will be seen that it is positive in its operation, and it Will be understood that the locking parts can be applied to any usual form of controlling lever and elevator car and floor so thaty the device is therefore easily applicable to existing elevator structures.

I claim l. An apparatus of the kind described comprising in combination the controlling lever of an elevator car, a fiXed dog on the lever, a swinging arm arranged adjacent t0 and crossing the lever, pavvls carried by the cross arm to engage the aforesaid dog, and means in the Well of the elevator and on the car floor for raising the aforesaid crossarm.

2. In an apparatus such as described, the combination with an elevator car and the controlling lever thereof, of a fixed dog on the lever, a Weighted cross arm arranged adjacent to the lever, a block on the cross arm, spring pressed paWls carried by the block and arranged to engage the aforesaid dog on the lever, and means in the Well of the elevator and on the car Hoor for raising the aforesaid cross arm.

3. In an apparatus such as described, the combination With the elevator car and the controlling lever thereof, of a dog on the lever, a pivoted cross arm traversing the controlling lever, pawls on the cross arm to engage the aforesaid dog, a link depending from the free end of the cross arm, a bell crank one arm of which supports the aforesaid link, a slide bar arranged on the car and engaging the lower arm of the bell crank, a shoe on the fioor of the elevator Well to engage the slide bar, and means for actuating the shoeby the opening of the elevator door.

4. The combination with the controlling lever of an elevator car, of a dog or projection 0n the said lever, a swinging arm crossing the lever, pawls carried by the arm to engage the aforesaid dog and lock the lever when the latter is in position to stop the car, said lockingdevice being adapted to normally drop by gravity out of locking engagement, and means in the well of the elevator and on the car floor to raise the aforesaid locking device into position to lock the lever.

RICHARD F. LE BROCQ.

Witnesses IVARREN B. IIUTCHINSON, ARTHUR G. DANNELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

